Question 1

Which of the following best describes a chemical property?

Accepted Answer

Iron rusts when exposed to oxygen.

Question 2

Which of the following is an example of a physical change?

Accepted Answer

Dissolving sugar in water.

Question 3

A student observes a sample of matter that has a definite volume but no definite shape. Which state of matter is being described?

Accepted Answer

Liquid

Question 4

Which of the following best describes a homogeneous mixture?

Accepted Answer

Saltwater solution.

Question 5

Which of the following is NOT a step in the scientific method?

Accepted Answer

Ignoring experimental results

Question 6

Which of the following statements about matter is correct?

Accepted Answer

Matter can be classified as elements, compounds, or mixtures.

Question 7

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Concrete

Question 8

A scientist proposes that increasing the temperature of a solution will increase the rate at which a solute dissolves. This statement is best described as:

Accepted Answer

A hypothesis

Question 9

Which of the following diagrams best represents a pure compound?

Accepted Answer

A box containing only one type of molecule, each made of two different atoms bonded together.

Question 10

Which of the following is a chemical change?

Accepted Answer

Decomposition of hydrogen peroxide into water and oxygen

Question 11

Which of the following best describes the difference between a theory and a law in science?

Accepted Answer

A theory explains why phenomena occur, while a law describes what happens.

Question 12

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 13

A student mixes two clear solutions and observes the formation of a white precipitate. This observation is evidence of:

Accepted Answer

A chemical change

Question 14

Which of the following is the best example of a pure substance?

Accepted Answer

Salt (NaCl)

Question 15

Which of the following is NOT a characteristic of a solid?

Accepted Answer

Particles are far apart

Question 16

Which of the following best describes the process of distillation?

Accepted Answer

Separating a mixture based on differences in boiling points

Question 17

Which of the following is an intensive property?

Accepted Answer

Density

Question 18

Which of the following is the best example of a chemical property?

Accepted Answer

Copper reacts with nitric acid to produce a blue solution

Question 19

Which of the following is a correct statement about mixtures?

Accepted Answer

Mixtures have variable composition.

Question 20

A student hypothesizes that increasing the concentration of reactants will increase the rate of a chemical reaction. Which step of the scientific method does this represent?

Accepted Answer

Hypothesis

Chapter 1 Study Notes: Matter, Energy, and Measurement

Guida di studio - Domande di pratica

Study guide - Flashcard